Mirror unit



FIG. 1 is a rear perspective view of a mirror unit according to thepresent design;

FIG. 2 is a front end view thereof;

FIG. 3 is a rear end view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is a front elevation view thereof.

The portions shown in broken lines are for illustrative purposes onlyand form no part of the claimed design.

The ornamental design for a mirror unit, as shown and described.